Question

I need a in depth look at the following question.

What factors influence the percent of VO₂max at which the lactate threshold occurs? That is, for some people, the lactate threshold occurs at 50% of their max while for others, it occurs at 75% of their max. What causes these differences? In addition to listing the factors, explain how they would increase or decrease the threshold.

Answer 1

VO2 Max: Volume of maximum O2 (oxygen) consumption during increasing intensity of exercise.

There are various factors which affects the VO2 max of any individual

• Factors affecting VO2 max:

1. Relation of Cardiovascular Performance to VO2 Max: During maximal exercise, both the heart price and the stroke quantity are elevated to about 95 according to cent of their maximal levels. Because the cardiac output is equal to stroke quantity times coronary heart price, one reveals that the cardiac output is set ninety in line with cent of the maximum that the character can reap. This is in evaluation to about sixty five consistent with cent of maximum for pulmonary ventilation. Therefore, you may quite simply see that the cardiovascular systemis typically a good deal extra restricting on VO2 Max than is the respiratory device, due to the fact oxygen usage by means of the body can never be extra than the rate at which the cardiovascular machine can delivery oxygen to the tissues.For this purpose, it's far often said that the extent of athletic overall performance that may be performed by way of the marathoner in particular relies upon at the performance functionality of his or her heart, due to the fact this is the maximum limiting link in the transport of good enough oxygen to the workout muscle mass.So greater the Cardiac Out put will lead decrease of lactate threshold.
2. Blood oxygen carrying capacity : If the person or the athelet blood volume is or the RBC count is more than the normal range then the person will be able to carry more oxygen than the individuals with normal blood volume & RBC count,as a result the lactate threshold will decrease or lactate threshold will occur.
3. Mitochondrial function: The mitochondria is the main unit in the muscles for ATP production,but if the mitochondria is lack of ATP producing enzymes then the lactate threshold in the person will occurs very soon than the persons who have adapted with the mitochondia with avaiilable amount of enzymes.
4. Capillary density in the Muscle: If the muscle is prperly vascularized with number of capillaries in the muscles then the individual muscle will get supply of sufficient amt. of oxygen and lactate threshold will be delayed or increase.
5. Effect of Drugs: Drugs like EPO (erythropoietin) can stimulate the production of RBC in large quantity and the increase RBC will lead sufficient oxygen supply in the working muscles and lactate threshold will delayed or increase.